braddog5450
19.01.2021 •
Mathematics
On Dolores's tenth birthday her grandfather deposited $35
in a savings account for her. Each year, her grandfather
deposited twice the amount of the previous year's deposit.
How much money did her grandfather deposit on Dolores's
eighteenth birthday?
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Ответ:
Her grandfather deposited $4480 on Dolores's eighteenth birthday.
Step-by-step explanation:
Initial amount deposited = $35 (on tenth birthday)
Amount deposited after a year = 2 x ($35) (on eleventh birthday)
Amount deposited after 2 years =2 x( 2 x ($35)) = 2²(35)(on eleventh birthday)
It is following the geometric progression, where a= 35, r= 2 (common ratio)
nth term in GP =
Amount deposited on eighteenth birthday (i.e. n=8) =
Hence, Her grandfather deposited $4480 on Dolores's eighteenth birthday.
Ответ:
add 5 to 5 which will give you 10.
Step-by-step explanation: Hope this helps!